Red. (Den of Mercenaries #1) by London Miller

Welcome to the Den…

Seven years ago, Niklaus “Red” Volkov was offered an opportunity, one that would give him the ability to even the score with the Albanian mobsters that had tortured him for days and took the life of the only girl he’d loved.

But that gift came with strings…

Molded into the perfect soldier, Niklaus joined an elite group of mercenaries, loyal to a mysterious man known only as The Kingmaker. He willingly paid the price for means to fulfill the vendetta that plagued him each day.